CVE-2026-4430

5.4 mediumEPSS 0.08%

Medium (5.4) in libreoffice libreoffice. EPSS 0.08% chance of exploitation in the next 30 days.

Out-of-bounds write vulnerability in The Document Foundation LibreOffice via crafted OOXML documents with mismatched encryption salt parameters. This issue affects LibreOffice: from 26.2 before 26.2.3, from 25.8 before 25.8.7.

Severity

CVSS 4.0

5.4 medium

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:P

CVSS 3.1

7.8 high

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS: 0.08% chance of exploitation in the next 30 days; higher than 0% of CVEs (scores of 2026-10-31)
CWE: CWE-787
Published: 2026-05-07
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

libreoffice:libreoffice

References

https://www.libreoffice.org/about-us/security/advisories/cve-2026-4430

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